MM3474R03VBE

Overview

The MM3474R03VBE is a power supply support circuit manufactured by Mitsumi Electric Co Ltd, designed for battery protection applications. It functions as an integrated circuit for 3 to 5 cell lithium-ion and lithium-polymer rechargeable secondary batteries. The device provides comprehensive protection against overcharge, overdischarge, discharge overcurrent, and short circuits within the battery pack. It is housed in a TSSOP20 package with a shrink pitch small outline form factor. The component operates within an industrial temperature range of -40 °C to +85 °C and features a maximum supply current of 0.02 mA.

Feature Summary

• Monolithic integration for detecting overcharge, overdischarge, and overcurrent conditions in multi-cell lithium-based battery packs
• Short circuit detection capability to ensure safety during fault events
• Designed specifically for 3 to 5 series connected lithium-ion or lithium-polymer rechargeable secondary batteries

Applications

• Protection circuits for portable electronic devices using multi-cell lithium-ion batteries
• Safety management systems for lithium-polymer battery packs in consumer electronics
• Battery management units requiring integrated overcharge and overdischarge prevention

Procurement Notes

Verify the exact suffix R03VBE against official Mitsumi documentation to confirm pinout and specific electrical tolerances. Ensure compatibility with the target PCB footprint for the TSSOP20 package. Confirm that the industrial temperature rating meets the operational requirements of the end application environment.

Selection Notes

Select this component when designing protection circuits for 3 to 5 series lithium cells requiring integrated fault detection. Consider the TSSOP20 package constraints and the low standby current consumption. Verify that the monolithic design simplifies the bill of materials compared to discrete solutions for overvoltage and overcurrent protection.

Part Context

The MM3474 series belongs to Mitsumi's portfolio of battery protection ICs. Similar parts include the MM3645 for single-cell applications and the MM3684 for multi-cell configurations. These components share the common function of safeguarding lithium-based energy storage systems from hazardous electrical conditions through integrated monitoring logic.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.